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ArcGIS Explorer includes a Software Developer Kit (SDK). The aim of the SDK is to support developers in using the ArcGIS Explorer Application Programming Interface (API) to build add-ins which plug into the ArcGIS Explorer application.
An add-in can be used to add a wide variety of functions to the standard ArcGIS Explorer interface, as it can execute any custom code. You could use an add-in to retrieve data or images from the Internet, query a remote database, perform a geoprocessing task on a remote server and extract information from the results, and so on.
You can also use an add-in in order to interact with the other classes in the object model of ArcGIS Explorer; for example you can find out information about the existing layers and results, run other add-ins, add content to the map and search the features in local vector layers.
ArcGIS Explorer API provides six types of 'Add-Ins' as a means to extend the application: buttons, check boxes, combo boxes, dockable windows, extensions, and galleries. Each type of add-in is implemented in .NET by deriving from an abstract class in the ESRI.ArcGISExplorer.Application namespace.
The ArcGIS Explorer API relies upon the Microsoft .NET 3.5 Framework Service Pack 1. The .NET Framework is integral to successful development and deployment of add-ins; either Microsoft Visual Studio 2008 or 2010 (.NET development environments) is required to develop add-ins. The .NET Framework is an install requirement for ArcGIS Explorer, and so is present on machines to which add-ins are deployed. The ArcGIS Explorer API supports all current editions of Microsoft Visual Studio 2008 and 2010 (Express through to Enterprise), and two .NET languages (C# and VB.NET) are supported for add-in development.
Using Microsoft Visual Studio and the ArcGIS Explorer API, add-ins can be developed. Once you have authored an add-in in Visual Studio, the add-in is compiled as a Dynamic Link Library (DLL) file and packaged into an Add-in file (.eaz). When you point ArcGIS Explorer at the add-in file, it recognizes the file as an add-in, and the add-in is available for use in ArcGIS Explorer using the ArcGIS Explorer Add-Ins dialog.
Note Add-ins are the only type of programmatic customization possible in ArcGIS Explorer; you cannot create any other types of custom class for ArcGIS Explorer, neither can you embed ArcGIS Explorer functionality into any other application. Non-programmatic customization of the appearance of the application is possible using application configuration files.
Learn more about application configurations
To create an add-in, you must install the ArcGIS Explorer SDK. In addition to a version of its conceptual and component help that integrates into the Visual Studio IDE, the ArcGIS Explorer SDK installs a number of items that empower developers to make the most of the ArcGIS Explorer API:
ArcGIS Online has information on ArcGIS Server and publishing layers viewable in ArcGIS Explorer; for more information on creating add-ins, consult the ArcGIS Explorer Developer Help.